[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
6		11
7	#include <signal.h>	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
8		15
9	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
10	# include <unistd.h>	17	# include <unistd.h>
11	# include <sys/mman.h>	18	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
14	# define MAP_ANONYMOUS MAP_ANON	21	# define MAP_ANONYMOUS MAP_ANON
15	# else	22	# else
16	# undef HAVE_MMAP	23	# undef HAVE_MMAP
17	# endif	24	# endif
18	# endif	25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
19	#endif	33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
20		38
21	#define MAY_FLUSH /* increases codesize and is rarely used */	39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
22		45
23	#define SUB_INIT "Coro::State::initialize"	46	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	47	#define MAX_IDLE_CCTX 8
25		48
26	/* The next macro should declare a variable stacklevel that contains and approximation	49	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	50	(PERL_REVISION > (a) \
28	* and should be unique. */	51	\|\| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
30		106
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		108
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
34		123
35	#include "CoroAPI.h"	124	#include "CoroAPI.h"
36		125
		126	#ifdef USE_ITHREADS
		127	static perl_mutex coro_mutex;
		128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		130	#else
		131	# define LOCK (void)0
		132	# define UNLOCK (void)0
		133	#endif
		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
		148	static AV main_mainstack; / used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
		150	static HV coro_state_stash, coro_stash;
		151	static SV coro_mortal; / will be freed after next transfer */
38		152
39	/* this is actually not only the c stack but also c registers etc... */	153	static GV irsgv; / $/ */
		154	static GV stdoutgv; / STDOUT /
		155
		156	static HV hv_sig; / %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void idle_sp; / sp of top-level transfer/schedule/cede call */
		187	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
40	typedef struct {	205	typedef struct {
41	int refcnt; /* pointer reference counter */	206	SV *defsv;
42	int usecnt; /* shared by how many coroutines */	207	AV *defav;
43	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
44		214
45	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46		216
47	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50
51	struct coro {	218	struct coro {
52	/* the optional C context */	219	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	220	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56		221
57	/* optionally saved, might be zero */	222	/* process data */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;	223	AV *mainstack;
70	SV **stack_sp;	224	perl_slots slot; / basically the saved sp */
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	PMOP *curpm;
93	JMPENV *top_env;
94		225
95	/* data associated with this coroutine (initial args) */	226	AV args; / data associated with this coroutine (initial args) */
96	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
		228	int flags; /* CF_ flags */
		229	HV hv; / the perl hash associated with this coro, if any */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV throw; / exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro next, prev;
97	};	243	};
98		244
99	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
101
102	static AV main_mainstack; / used to differentiate between $main and others */
103	static HV *coro_state_stash;
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV coro_mortal; / will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{
113	AV *av;
114	I32 ix;
115	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
116	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV newpadlist, newpad_name, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131
132	newpadlist = newAV ();
133	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);
135	av_store (newpadlist, 1, (SV *) newpad);
136
137	av = newAV (); /* will be @_ */
138	av_extend (av, 0);
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141
142	for (ix = fpad; ix > 0; ix--)
143	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
145	if (namesv && namesv != &PL_sv_undef)
146	{
147	char name = SvPVX (namesv); / XXX */
148	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}
152	else
153	{ /* our own lexical */
154	SV *sv;
155	if (*name == '&')
156	sv = SvREFCNT_inc (ppad[ix]);
157	else if (*name == '@')
158	sv = (SV *) newAV ();
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}
167	}
168	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV kid = cv_clone((CV)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV sv = svp ? svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);
220	}
221	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV )he) >= 0)
231	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	he = (SV )newAV ();
245	}
246
247	av_push ((AV )he, (SV *)CvPADLIST (cv));
248	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV av = (AV )HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275
276	#define SB do {
277	#define SE } while (0)
278
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284	static void
285	load_state(pTHX_ Coro__State c)
286	{
287	PL_dowarn = c->dowarn;
288	PL_in_eval = c->in_eval;
289
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_stack_base = c->stack_base;
297	PL_stack_max = c->stack_max;
298	PL_tmps_stack = c->tmps_stack;
299	PL_tmps_floor = c->tmps_floor;
300	PL_tmps_ix = c->tmps_ix;
301	PL_tmps_max = c->tmps_max;
302	PL_markstack = c->markstack;
303	PL_markstack_ptr = c->markstack_ptr;
304	PL_markstack_max = c->markstack_max;
305	PL_scopestack = c->scopestack;
306	PL_scopestack_ix = c->scopestack_ix;
307	PL_scopestack_max = c->scopestack_max;
308	PL_savestack = c->savestack;
309	PL_savestack_ix = c->savestack_ix;
310	PL_savestack_max = c->savestack_max;
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	PL_curcop = c->curcop;
315	PL_top_env = c->top_env;
316
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320
321	{
322	dSP;
323	CV *cv;
324
325	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))
327	{
328	AV padlist = (AV )POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;
334	#ifdef USE_THREADS
335	/CvOWNER(cv) = (struct perl_thread )POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}
341
342	PUTBACK;
343	}
344	}
345
346	static void
347	save_state(pTHX_ Coro__State c, int flags)
348	{
349	{
350	dSP;
351	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;
353	PERL_SI *top_si = PL_curstackinfo;
354
355	/*
356	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(
358	*/
359
360	PUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */
362	for (;;)
363	{
364	while (cxix >= 0)
365	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];
367
368	if (CxTYPE(cx) == CXt_SUB)
369	{
370	CV *cv = cx->blk_sub.cv;
371	if (CvDEPTH(cv))
372	{
373	#ifdef USE_THREADS
374	/XPUSHs ((SV )CvOWNER(cv));*/
375	/CvOWNER(cv) = 0;/
376	/error must unlock this cv etc.. etc.../
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);
379
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));
388	PUSHs ((SV *)cv);
389
390	get_padlist (cv); /* this is a monster */
391	}
392	}
393	else if (CxTYPE(cx) == CXt_FORMAT)
394	{
395	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}
399	}
400
401	if (top_si->si_type == PERLSI_MAIN)
402	break;
403
404	top_si = top_si->si_prev;
405	ccstk = top_si->si_cxstack;
406	cxix = top_si->si_cxix;
407	}
408
409	PUTBACK;
410	}
411
412	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
415
416	c->dowarn = PL_dowarn;
417	c->in_eval = PL_in_eval;
418
419	c->curstackinfo = PL_curstackinfo;
420	c->curstack = PL_curstack;
421	c->mainstack = PL_mainstack;
422	c->stack_sp = PL_stack_sp;
423	c->op = PL_op;
424	c->curpad = PL_curpad;
425	c->stack_base = PL_stack_base;
426	c->stack_max = PL_stack_max;
427	c->tmps_stack = PL_tmps_stack;
428	c->tmps_floor = PL_tmps_floor;
429	c->tmps_ix = PL_tmps_ix;
430	c->tmps_max = PL_tmps_max;
431	c->markstack = PL_markstack;
432	c->markstack_ptr = PL_markstack_ptr;
433	c->markstack_max = PL_markstack_max;
434	c->scopestack = PL_scopestack;
435	c->scopestack_ix = PL_scopestack_ix;
436	c->scopestack_max = PL_scopestack_max;
437	c->savestack = PL_savestack;
438	c->savestack_ix = PL_savestack_ix;
439	c->savestack_max = PL_savestack_max;
440	c->retstack = PL_retstack;
441	c->retstack_ix = PL_retstack_ix;
442	c->retstack_max = PL_retstack_max;
443	c->curcop = PL_curcop;
444	c->top_env = PL_top_env;
445	}
446
447	/*
448	* allocate various perl stacks. This is an exact copy
449	* of perl.c:init_stacks, except that it uses less memory
450	* on the assumption that coroutines do not usually need
451	* a lot of stackspace.
452	*/
453	STATIC void
454	coro_init_stacks (pTHX)
455	{
456	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
457	PL_curstackinfo->si_type = PERLSI_MAIN;
458	PL_curstack = PL_curstackinfo->si_stack;
459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460
461	PL_stack_base = AvARRAY(PL_curstack);
462	PL_stack_sp = PL_stack_base;
463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464
465	New(50,PL_tmps_stack,96,SV*);
466	PL_tmps_floor = -1;
467	PL_tmps_ix = -1;
468	PL_tmps_max = 96;
469
470	New(54,PL_markstack,16,I32);
471	PL_markstack_ptr = PL_markstack;
472	PL_markstack_max = PL_markstack + 16;
473
474	SET_MARK_OFFSET;
475
476	New(54,PL_scopestack,16,I32);
477	PL_scopestack_ix = 0;
478	PL_scopestack_max = 16;
479
480	New(54,PL_savestack,96,ANY);
481	PL_savestack_ix = 0;
482	PL_savestack_max = 96;
483
484	New(54,PL_retstack,8,OP*);
485	PL_retstack_ix = 0;
486	PL_retstack_max = 8;
487	}
488
489	/*
490	* destroy the stacks, the callchain etc...
491	* still there is a memleak of 128 bytes...
492	*/
493	STATIC void
494	destroy_stacks(pTHX)
495	{
496	if (!IN_DESTRUCT)
497	{
498	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)
500	LEAVE;
501
502	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;
505	}
506
507	while (PL_curstackinfo->si_next)
508	PL_curstackinfo = PL_curstackinfo->si_next;
509
510	while (PL_curstackinfo)
511	{
512	PERL_SI *p = PL_curstackinfo->si_prev;
513
514	{
515	dSP;
516	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517	PUTBACK; /* possibly superfluous */
518	}
519
520	if (!IN_DESTRUCT)
521	{
522	dounwind(-1);
523	SvREFCNT_dec(PL_curstackinfo->si_stack);
524	}
525
526	Safefree(PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);
528	PL_curstackinfo = p;
529	}
530
531	Safefree(PL_tmps_stack);
532	Safefree(PL_markstack);
533	Safefree(PL_scopestack);
534	Safefree(PL_savestack);
535	Safefree(PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif
555	{
556	/FIXME//D//* reasonable stack size! */
557	stack->ssize = -4096 * sizeof (long);
558	New (0, stack->sptr, 4096, long);
559	}
560	}
561	else
562	stack->sptr = 0;
563
564	ctx->stack = stack;
565	}
566
567	static void
568	deallocate_stack (Coro__State ctx)
569	{
570	coro_stack *stack = ctx->stack;
571
572	ctx->stack = 0;
573
574	if (stack)
575	{
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591
592	static void
593	setup_coro (void *arg)
594	{
595	/*
596	* emulate part of the perl startup here.
597	*/
598	dSP;
599	Coro__State ctx = (Coro__State)arg;
600	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
601
602	coro_init_stacks (aTHX);
603	PL_curpm = 0; /* segfault on first access */
604	/PL_curcop = 0;/
605	/PL_in_eval = PL_in_eval;/ /* inherit */
606	SvREFCNT_dec (GvAV (PL_defgv));
607	GvAV (PL_defgv) = ctx->args;
608
609	SPAGAIN;
610
611	if (ctx->stack)
612	{
613	ctx->cursp = 0;
614
615	PUSHMARK(SP);
616	PUTBACK;
617	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
618
619	if (SvTRUE (ERRSV))
620	croak (NULL);
621	else
622	croak ("FATAL: CCTXT coroutine returned!");
623	}
624	else
625	{
626	UNOP myop;
627
628	PL_op = (OP *)&myop;
629
630	Zero(&myop, 1, UNOP);
631	myop.op_next = Nullop;
632	myop.op_flags = OPf_WANT_VOID;
633
634	PUSHMARK(SP);
635	XPUSHs (sub_init);
636	/*
637	* the next line is slightly wrong, as PL_op->op_next
638	* is actually being executed so we skip the first op.
639	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)
642	*/
643	PUTBACK;
644	PL_op = pp_entersub();
645	SPAGAIN;
646
647	ENTER; /* necessary e.g. for dounwind */
648	}
649	}
650
651	static void
652	continue_coro (void *arg)
653	{
654	/*
655	* this is a _very_ stripped down perl interpreter ;)
656	*/
657	Coro__State ctx = (Coro__State)arg;
658	JMPENV coro_start_env;
659
660	/* same as JMPENV_BOOTSTRAP */
661	Zero(&coro_start_env, 1, JMPENV);
662	coro_start_env.je_ret = -1;
663	coro_start_env.je_mustcatch = TRUE;
664	PL_top_env = &coro_start_env;
665
666	ctx->cursp = 0;
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669
670	abort ();
671	}
672
673	STATIC void
674	transfer(pTHX_ struct coro prev, struct coro next, int flags)
675	{
676	dSTACKLEVEL;
677	static struct coro *xnext;
678
679	if (prev != next)
680	{
681	xnext = next;
682
683	if (next->mainstack)
684	{
685	SAVE (prev, flags);
686	LOAD (next);
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}
719	else if (next->tmps_ix == -2)
720	croak ("tried to transfer to running coroutine");
721	else
722	{
723	SAVE (prev, -1); /* first get rid of the old state */
724
725	if (flags & TRANSFER_SAVE_CCTXT)
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	setup_coro (next);
733
734	prev->stack->refcnt++;
735	prev->stack->usecnt++;
736	next->stack = prev->stack;
737	next->gencnt = prev->gencnt;
738	}
739	else
740	{
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	setup_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	/* don't add any code here */
747	}
748	}
749	else
750	setup_coro (next);
751	}
752
753	/*
754	* xnext is now either prev or next, depending on wether
755	* we switched the c stack or not. that's why i use a global
756	* variable, that should become thread-specific at one point.
757	*/
758	xnext->cursp = stacklevel;
759	}
760
761	if (coro_mortal)
762	{
763	SvREFCNT_dec (coro_mortal);
764	coro_mortal = 0;
765	}
766	}
767
768	#define SV_CORO(sv,func) \
769	do { \
770	if (SvROK (sv)) \
771	sv = SvRV (sv); \
772	\
773	if (SvTYPE(sv) == SVt_PVHV) \
774	{ \
775	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
776	\
777	if (!he) \
778	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779	\
780	(sv) = SvRV (HeVAL(he)); \
781	} \
782	\
783	/* must also be changed inside Coro::Cont::yield */ \
784	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
785	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786	\
787	} while(0)
788
789	#define SvSTATE(sv) (struct coro *)SvIV (sv)
790
791	static void
792	api_transfer(pTHX_ SV prev, SV next, int flags)
793	{
794	SV_CORO (prev, "Coro::transfer");
795	SV_CORO (next, "Coro::transfer");
796
797	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
798	}
799		247
800	/ Coro ******************************************************************/	248	/ Coro ******************************************************************/
801		249
802	#define PRIO_MAX 3	250	#define PRIO_MAX 3
803	#define PRIO_HIGH 1	251	#define PRIO_HIGH 1
…		…
805	#define PRIO_LOW -1	253	#define PRIO_LOW -1
806	#define PRIO_IDLE -3	254	#define PRIO_IDLE -3
807	#define PRIO_MIN -4	255	#define PRIO_MIN -4
808		256
809	/* for Coro.pm */	257	/* for Coro.pm */
810	static GV coro_current, coro_idle;	258	static SV *coro_current;
811	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
812	static int coro_nready;	260	static int coro_nready;
		261	static struct coro *coro_first;
813		262
814	static void	263	/ lowlevel stuff ********************************************************/
815	coro_enq (SV *sv)
816	{
817	if (SvTYPE (sv) == SVt_PVHV)
818	{
819	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
820	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822	prio = prio > PRIO_MAX ? PRIO_MAX
823	: prio < PRIO_MIN ? PRIO_MIN
824	: prio;
825
826	av_push (coro_ready [prio - PRIO_MIN], sv);
827	coro_nready++;
828
829	return;
830	}
831
832	croak ("Coro::ready tried to enqueue something that is not a coroutine");
833	}
834		264
835	static SV *	265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
		275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
		296	coro_clone_padlist (pTHX_ CV *cv)
		297	{
		298	AV *padlist = CvPADLIST (cv);
		299	AV newpadlist, newpad;
		300
		301	newpadlist = newAV ();
		302	AvREAL_off (newpadlist);
		303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		307	#endif
		308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		309	--AvFILLp (padlist);
		310
		311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		312	av_store (newpadlist, 1, (SV *)newpad);
		313
		314	return newpadlist;
		315	}
		316
		317	static void
		318	free_padlist (pTHX_ AV *padlist)
		319	{
		320	/* may be during global destruction */
		321	if (SvREFCNT (padlist))
		322	{
		323	I32 i = AvFILLp (padlist);
		324	while (i >= 0)
		325	{
		326	SV **svp = av_fetch (padlist, i--, FALSE);
		327	if (svp)
		328	{
		329	SV *sv;
		330	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		331	SvREFCNT_dec (sv);
		332
		333	SvREFCNT_dec (*svp);
		334	}
		335	}
		336
		337	SvREFCNT_dec ((SV*)padlist);
		338	}
		339	}
		340
		341	static int
		342	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		343	{
		344	AV *padlist;
		345	AV av = (AV )mg->mg_obj;
		346
		347	/* casting is fun. */
		348	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		349	free_padlist (aTHX_ padlist);
		350
		351	SvREFCNT_dec (av);
		352
		353	return 0;
		354	}
		355
		356	#define PERL_MAGIC_coro PERL_MAGIC_ext
		357
		358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
		393	/* the next two functions merely cache the padlists */
		394	static void
		395	get_padlist (pTHX_ CV *cv)
		396	{
		397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
		399
		400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		402	else
		403	{
		404	#if CORO_PREFER_PERL_FUNCTIONS
		405	/* this is probably cleaner, but also slower? */
		406	CV *cp = Perl_cv_clone (cv);
		407	CvPADLIST (cv) = CvPADLIST (cp);
		408	CvPADLIST (cp) = 0;
		409	SvREFCNT_dec (cp);
		410	#else
		411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		412	#endif
		413	}
		414	}
		415
		416	static void
		417	put_padlist (pTHX_ CV *cv)
		418	{
		419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
		421
		422	if (expect_false (!mg))
		423	{
		424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		426	mg->mg_virtual = &vtbl_coro;
		427	mg->mg_obj = (SV *)newAV ();
		428	}
		429
		430	av = (AV *)mg->mg_obj;
		431
		432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		433	av_extend (av, AvMAX (av) + 1);
		434
		435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		436	}
		437
		438	/ load & save, init *****************************************************/
		439
		440	static void
		441	load_perl (pTHX_ Coro__State c)
		442	{
		443	perl_slots *slot = c->slot;
		444	c->slot = 0;
		445
		446	PL_mainstack = c->mainstack;
		447
		448	GvSV (PL_defgv) = slot->defsv;
		449	GvAV (PL_defgv) = slot->defav;
		450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		458	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
		459
		460	{
		461	dSP;
		462
		463	CV *cv;
		464
		465	/* now do the ugly restore mess */
		466	while (expect_true (cv = (CV *)POPs))
		467	{
		468	put_padlist (aTHX_ cv); /* mark this padlist as available */
		469	CvDEPTH (cv) = PTR2IV (POPs);
		470	CvPADLIST (cv) = (AV *)POPs;
		471	}
		472
		473	PUTBACK;
		474	}
		475	}
		476
		477	static void
		478	save_perl (pTHX_ Coro__State c)
		479	{
		480	{
		481	dSP;
		482	I32 cxix = cxstack_ix;
		483	PERL_CONTEXT *ccstk = cxstack;
		484	PERL_SI *top_si = PL_curstackinfo;
		485
		486	/*
		487	* the worst thing you can imagine happens first - we have to save
		488	* (and reinitialize) all cv's in the whole callchain :(
		489	*/
		490
		491	XPUSHs (Nullsv);
		492	/* this loop was inspired by pp_caller */
		493	for (;;)
		494	{
		495	while (expect_true (cxix >= 0))
		496	{
		497	PERL_CONTEXT *cx = &ccstk[cxix--];
		498
		499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		500	{
		501	CV *cv = cx->blk_sub.cv;
		502
		503	if (expect_true (CvDEPTH (cv)))
		504	{
		505	EXTEND (SP, 3);
		506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		508	PUSHs ((SV *)cv);
		509
		510	CvDEPTH (cv) = 0;
		511	get_padlist (aTHX_ cv);
		512	}
		513	}
		514	}
		515
		516	if (expect_true (top_si->si_type == PERLSI_MAIN))
		517	break;
		518
		519	top_si = top_si->si_prev;
		520	ccstk = top_si->si_cxstack;
		521	cxix = top_si->si_cxix;
		522	}
		523
		524	PUTBACK;
		525	}
		526
		527	/* allocate some space on the context stack for our purposes */
		528	/* we manually unroll here, as usually 2 slots is enough */
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
		549	#define VAR(name,type) slot->name = PL_ ## name;
		550	# include "state.h"
		551	#undef VAR
		552	}
		553	}
		554
		555	/*
		556	* allocate various perl stacks. This is an exact copy
		557	* of perl.c:init_stacks, except that it uses less memory
		558	* on the (sometimes correct) assumption that coroutines do
		559	* not usually need a lot of stackspace.
		560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
		565	coro_init_stacks (pTHX)
		566	{
		567	PL_curstackinfo = new_stackinfo(32, 8);
		568	PL_curstackinfo->si_type = PERLSI_MAIN;
		569	PL_curstack = PL_curstackinfo->si_stack;
		570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		571
		572	PL_stack_base = AvARRAY(PL_curstack);
		573	PL_stack_sp = PL_stack_base;
		574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		575
		576	New(50,PL_tmps_stack,32,SV*);
		577	PL_tmps_floor = -1;
		578	PL_tmps_ix = -1;
		579	PL_tmps_max = 32;
		580
		581	New(54,PL_markstack,16,I32);
		582	PL_markstack_ptr = PL_markstack;
		583	PL_markstack_max = PL_markstack + 16;
		584
		585	#ifdef SET_MARK_OFFSET
		586	SET_MARK_OFFSET;
		587	#endif
		588
		589	New(54,PL_scopestack,8,I32);
		590	PL_scopestack_ix = 0;
		591	PL_scopestack_max = 8;
		592
		593	New(54,PL_savestack,24,ANY);
		594	PL_savestack_ix = 0;
		595	PL_savestack_max = 24;
		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
		598	New(54,PL_retstack,4,OP*);
		599	PL_retstack_ix = 0;
		600	PL_retstack_max = 4;
		601	#endif
		602	}
		603	#endif
		604
		605	/*
		606	* destroy the stacks, the callchain etc...
		607	*/
		608	static void
		609	coro_destroy_stacks (pTHX)
		610	{
		611	while (PL_curstackinfo->si_next)
		612	PL_curstackinfo = PL_curstackinfo->si_next;
		613
		614	while (PL_curstackinfo)
		615	{
		616	PERL_SI *p = PL_curstackinfo->si_prev;
		617
		618	if (!IN_DESTRUCT)
		619	SvREFCNT_dec (PL_curstackinfo->si_stack);
		620
		621	Safefree (PL_curstackinfo->si_cxstack);
		622	Safefree (PL_curstackinfo);
		623	PL_curstackinfo = p;
		624	}
		625
		626	Safefree (PL_tmps_stack);
		627	Safefree (PL_markstack);
		628	Safefree (PL_scopestack);
		629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
		631	Safefree (PL_retstack);
		632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
		676	{
		677	/*
		678	* emulate part of the perl startup here.
		679	*/
		680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV bot, top;
		784	AV av = newAV (); / return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
		896	dSP;
		897	LOGOP myop;
		898
		899	PL_top_env = &PL_start_env;
		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
		904	Zero (&myop, 1, LOGOP);
		905	myop.op_next = PL_op;
		906	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
		913	PL_op = (OP *)&myop;
		914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		915	SPAGAIN;
		916	}
		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
		924	dTHX;
		925
		926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		927	UNLOCK;
		928
		929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
		931
		932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
		939	/*
		940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		948	}
		949
		950	static coro_cctx *
		951	cctx_new ()
		952	{
		953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
		956
		957	++cctx_count;
		958
		959	Newz (0, cctx, 1, coro_cctx);
		960
		961	#if HAVE_MMAP
		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		963	/* mmap supposedly does allocate-on-write for us */
		964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		965
		966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags \|= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
		980
		981	if (!cctx->sptr)
		982	{
		983	perror ("FATAL: unable to allocate stack for coroutine");
		984	_exit (EXIT_FAILURE);
		985	}
		986
		987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
		990
		991	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		993
		994	return cctx;
		995	}
		996
		997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/ coroutine switching ***************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro prev, struct coro next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
		1086	static void NOINLINE
		1087	transfer (pTHX_ struct coro prev, struct coro next)
		1088	{
		1089	dSTACKLEVEL;
		1090
		1091	/* sometimes transfer is only called to set idle_sp */
		1092	if (expect_false (!next))
		1093	{
		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1096	}
		1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
		1102	{
		1103	/* create a new empty context */
		1104	Newz (0, prev->cctx, 1, coro_cctx);
		1105	prev->flags &= ~CF_NEW;
		1106	prev->flags \|= CF_RUNNING;
		1107	}
		1108
		1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags \|= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
		1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
		1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
		1122	}
		1123	else
		1124	{
		1125	/* coroutine already started */
		1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
		1128	}
		1129
		1130	prev__cctx = prev->cctx;
		1131
		1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
		1147	}
		1148
		1149	++next->usecount;
		1150
		1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
		1155	{
		1156	prev__cctx->top_env = PL_top_env;
		1157	PL_top_env = next->cctx->top_env;
		1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1159	}
		1160
		1161	free_coro_mortal (aTHX);
		1162	UNLOCK;
		1163
		1164	if (expect_false (prev->throw \|\| next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
		1169	{
		1170	SV *exception = coro->throw;
		1171	coro->throw = 0;
		1172	sv_setsv (ERRSV, exception);
		1173	croak (0);
		1174	}
		1175	}
		1176	}
		1177	}
		1178
		1179	struct transfer_args
		1180	{
		1181	struct coro prev, next;
		1182	};
		1183
		1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1186
		1187	/ high level stuff ******************************************************/
		1188
		1189	static int
		1190	coro_state_destroy (pTHX_ struct coro *coro)
		1191	{
		1192	if (coro->flags & CF_DESTROYED)
		1193	return 0;
		1194
		1195	coro->flags \|= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
		1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
		1203	UNLOCK;
		1204	}
		1205	else
		1206	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1207
		1208	if (coro->mainstack && coro->mainstack != main_mainstack)
		1209	{
		1210	struct coro temp;
		1211
		1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
		1214
		1215	save_perl (aTHX_ &temp);
		1216	load_perl (aTHX_ coro);
		1217
		1218	coro_destroy (aTHX_ coro);
		1219
		1220	load_perl (aTHX_ &temp);
		1221
		1222	coro->slot = 0;
		1223	}
		1224
		1225	cctx_destroy (coro->cctx);
		1226	SvREFCNT_dec (coro->args);
		1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
		1233	}
		1234
		1235	static int
		1236	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1237	{
		1238	struct coro coro = (struct coro )mg->mg_ptr;
		1239	mg->mg_ptr = 0;
		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
		1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
		1248
		1249	return 0;
		1250	}
		1251
		1252	static int
		1253	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1254	{
		1255	struct coro coro = (struct coro )mg->mg_ptr;
		1256
		1257	++coro->refcnt;
		1258
		1259	return 0;
		1260	}
		1261
		1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
		1272
		1273	static void
		1274	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1275	{
		1276	ta->prev = SvSTATE (prev_sv);
		1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
		1279	}
		1280
		1281	static void
		1282	api_transfer (SV prev_sv, SV next_sv)
		1283	{
		1284	dTHX;
		1285	struct transfer_args ta;
		1286
		1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
		1289	}
		1290
		1291	/ Coro ******************************************************************/
		1292
		1293	static void
		1294	coro_enq (pTHX_ SV *coro_sv)
		1295	{
		1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1297	}
		1298
		1299	static SV *
836	coro_deq (int min_prio)	1300	coro_deq (pTHX_ int min_prio)
837	{	1301	{
838	int prio = PRIO_MAX - PRIO_MIN;	1302	int prio = PRIO_MAX - PRIO_MIN;
839		1303
840	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
841	if (min_prio < 0)	1305	if (min_prio < 0)
842	min_prio = 0;	1306	min_prio = 0;
843		1307
844	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
845	if (av_len (coro_ready[prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
846	{
847	coro_nready--;
848	return av_shift (coro_ready[prio]);	1310	return av_shift (coro_ready [prio]);
849	}
850		1311
851	return 0;	1312	return 0;
852	}	1313	}
853		1314
854	static void	1315	static int
855	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
856	{	1317	{
		1318	dTHX;
		1319	struct coro *coro;
		1320
857	if (SvROK (coro))	1321	if (SvROK (coro_sv))
858	coro = SvRV (coro);	1322	coro_sv = SvRV (coro_sv);
859		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags \|= CF_READY;
		1330
		1331	LOCK;
860	coro_enq (SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
		1334	UNLOCK;
		1335
		1336	return 1;
		1337	}
		1338
		1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
		1347	prepare_schedule (pTHX_ struct transfer_args *ta)
		1348	{
		1349	SV prev_sv, next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
		1404	static void
		1405	prepare_cede (pTHX_ struct transfer_args *ta)
		1406	{
		1407	api_ready (coro_current);
		1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
861	}	1423	}
862		1424
863	static void	1425	static void
864	api_schedule (void)	1426	api_schedule (void)
865	{	1427	{
866	SV prev, next;	1428	dTHX;
		1429	struct transfer_args ta;
867		1430
868	prev = SvRV (GvSV (coro_current));	1431	prepare_schedule (aTHX_ &ta);
869	next = coro_deq (PRIO_MIN);	1432	TRANSFER (ta);
870
871	if (!next)
872	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
873
874	/* free this only after the transfer */
875	coro_mortal = prev;
876	SV_CORO (prev, "Coro::schedule");
877
878	SvRV (GvSV (coro_current)) = next;
879
880	SV_CORO (next, "Coro::schedule");
881
882	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
883	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
884	}	1433	}
885		1434
886	static void	1435	static int
887	api_cede (void)	1436	api_cede (void)
888	{	1437	{
889	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1438	dTHX;
		1439	struct transfer_args ta;
890		1440
891	api_schedule ();	1441	prepare_cede (aTHX_ &ta);
892	}
893		1442
		1443	if (expect_true (ta.prev != ta.next))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
894	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
895		1494
896	PROTOTYPES: ENABLE	1495	PROTOTYPES: DISABLE
897		1496
898	BOOT:	1497	BOOT:
899	{ /* {} necessary for stoopid perl-5.6.x */	1498	{
900	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1499	#ifdef USE_ITHREADS
901	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1500	MUTEX_INIT (&coro_mutex);
		1501	#endif
		1502	BOOT_PAGESIZE;
		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
902	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903		1515
904	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
905	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
906	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
907	newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1520
913	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
914		1526
915	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
917	}
918		1529
919	Coro::State	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1531	}
921	SV * args	1532
922	PROTOTYPE: $	1533	SV *
		1534	new (char *klass, ...)
923	CODE:	1535	CODE:
924	Coro__State coro;	1536	{
		1537	struct coro *coro;
		1538	HV *hv;
		1539	int i;
925		1540
926	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
		1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
930		1544
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1545	if (coro_first) coro_first->prev = coro;
932	coro->mainstack = 0; /* actual work is done inside transfer */	1546	coro->next = coro_first;
933	coro->stack = 0;	1547	coro_first = coro;
934		1548
935	RETVAL = coro;	1549	coro->hv = hv = newHV ();
		1550	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1552
		1553	av_extend (coro->args, items - 1);
		1554	for (i = 1; i < items; i++)
		1555	av_push (coro->args, newSVsv (ST (i)));
		1556	}
936	OUTPUT:	1557	OUTPUT:
937	RETVAL	1558	RETVAL
938		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
939	void	1563	void
940	transfer(prev, next, flags)	1564	_set_stacklevel (...)
941	SV *prev	1565	ALIAS:
942	SV *next	1566	Coro::State::transfer = 1
943	int flags	1567	Coro::schedule = 2
944	PROTOTYPE: @	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
945	CODE:	1572	PPCODE:
946	PUTBACK;	1573	{
947	SV_CORO (next, "Coro::transfer");	1574	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1575	int again = 0;
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1576
950	SPAGAIN;	1577	do
		1578	{
		1579	switch (ix)
		1580	{
		1581	case 0:
		1582	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	again = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
		1635	}
		1636	while (again);
		1637
		1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1639	XSRETURN_YES;
		1640
		1641	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
		1642
		1643	bool
		1644	_destroy (SV *coro_sv)
		1645	CODE:
		1646	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1647	OUTPUT:
		1648	RETVAL
951		1649
952	void	1650	void
953	DESTROY(coro)
954	Coro::State coro
955	CODE:
956
957	if (coro->mainstack && coro->mainstack != main_mainstack)
958	{
959	struct coro temp;
960
961	PUTBACK;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963	LOAD(aTHX_ coro);
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977
978	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1651	_exit (code)
987	int code	1652	int code
988	PROTOTYPE: $	1653	PROTOTYPE: $
989	CODE:	1654	CODE:
990	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
991	_exit (code);	1655	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1656
998	MODULE = Coro::State PACKAGE = Coro::Cont	1657	int
		1658	cctx_stacksize (int new_stacksize = 0)
		1659	CODE:
		1660	RETVAL = coro_stacksize;
		1661	if (new_stacksize)
		1662	coro_stacksize = new_stacksize;
		1663	OUTPUT:
		1664	RETVAL
999		1665
1000	# this is slightly dirty (should expose a c-level api)	1666	int
		1667	cctx_count ()
		1668	CODE:
		1669	RETVAL = cctx_count;
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	int
		1674	cctx_idle ()
		1675	CODE:
		1676	RETVAL = cctx_idle;
		1677	OUTPUT:
		1678	RETVAL
1001		1679
1002	void	1680	void
1003	yield(...)	1681	list ()
1004	PROTOTYPE: @	1682	PPCODE:
		1683	{
		1684	struct coro *coro;
		1685	for (coro = coro_first; coro; coro = coro->next)
		1686	if (coro->hv)
		1687	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1688	}
		1689
		1690	void
		1691	call (Coro::State coro, SV *coderef)
		1692	ALIAS:
		1693	eval = 1
		1694	CODE:
		1695	{
		1696	if (coro->mainstack)
		1697	{
		1698	struct coro temp;
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ &temp);
		1703	load_perl (aTHX_ coro);
		1704	}
		1705
		1706	{
		1707	dSP;
		1708	ENTER;
		1709	SAVETMPS;
		1710	PUTBACK;
		1711	PUSHSTACK;
		1712	PUSHMARK (SP);
		1713
		1714	if (ix)
		1715	eval_sv (coderef, 0);
		1716	else
		1717	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1718
		1719	POPSTACK;
		1720	FREETMPS;
		1721	LEAVE;
		1722	}
		1723
		1724	if (!(coro->flags & CF_RUNNING))
		1725	{
		1726	save_perl (aTHX_ coro);
		1727	load_perl (aTHX_ &temp);
		1728	}
		1729	}
		1730	}
		1731
		1732	SV *
		1733	is_ready (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	is_ready = CF_READY
		1737	is_running = CF_RUNNING
		1738	is_new = CF_NEW
		1739	is_destroyed = CF_DESTROYED
		1740	CODE:
		1741	RETVAL = boolSV (coro->flags & ix);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1747
		1748	SV *
		1749	has_stack (Coro::State coro)
		1750	PROTOTYPE: $
		1751	CODE:
		1752	RETVAL = boolSV (!!coro->cctx);
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	int
		1757	is_traced (Coro::State coro)
		1758	PROTOTYPE: $
		1759	CODE:
		1760	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1761	OUTPUT:
		1762	RETVAL
		1763
		1764	IV
		1765	rss (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	usecount = 1
1005	CODE:	1769	CODE:
1006	static SV *returnstk;	1770	switch (ix)
1007	SV *sv;	1771	{
1008	AV *defav = GvAV (PL_defgv);	1772	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1009	struct coro prev, next;	1773	case 1: RETVAL = coro->usecount; break;
		1774	}
		1775	OUTPUT:
		1776	RETVAL
1010		1777
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1023	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1778
1028	MODULE = Coro::State PACKAGE = Coro	1779	MODULE = Coro::State PACKAGE = Coro
1029		1780
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1781	BOOT:
1033	{	1782	{
1034	int i;	1783	int i;
		1784
		1785	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1786	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1787	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1788
		1789	coro_current = coro_get_sv ("Coro::current", FALSE);
		1790	SvREADONLY_on (coro_current);
		1791
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1792	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1793
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1794	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1795	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1796	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1797	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1798	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1799	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046		1800
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1801	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1802	coro_ready[i] = newAV ();
1049		1803
1050	{	1804	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1805	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1806	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1052		1807
1053	coroapi.schedule = api_schedule;	1808	coroapi.schedule = api_schedule;
1054	coroapi.cede = api_cede;	1809	coroapi.cede = api_cede;
		1810	coroapi.cede_notself = api_cede_notself;
1055	coroapi.ready = api_ready;	1811	coroapi.ready = api_ready;
		1812	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1813	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1814	coroapi.current = coro_current;
1058		1815
1059	GCoroAPI = &coroapi;	1816	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1817	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1818	SvREADONLY_on (sv);
1062	}	1819	}
1063	}	1820	}
1064		1821
1065	void	1822	void
1066	ready(self)	1823	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1824	PROTOTYPE: $
1069	CODE:	1825	CODE:
1070	api_ready (self);	1826	SvREFCNT_dec (SvRV (coro_current));
		1827	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1828
1072	int	1829	int
		1830	prio (Coro::State coro, int newprio = 0)
		1831	ALIAS:
		1832	nice = 1
		1833	CODE:
		1834	{
		1835	RETVAL = coro->prio;
		1836
		1837	if (items > 1)
		1838	{
		1839	if (ix)
		1840	newprio = coro->prio - newprio;
		1841
		1842	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1843	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1844
		1845	coro->prio = newprio;
		1846	}
		1847	}
		1848	OUTPUT:
		1849	RETVAL
		1850
		1851	SV *
		1852	ready (SV *self)
		1853	PROTOTYPE: $
		1854	CODE:
		1855	RETVAL = boolSV (api_ready (self));
		1856	OUTPUT:
		1857	RETVAL
		1858
		1859	int
1073	nready(...)	1860	nready (...)
1074	PROTOTYPE:	1861	PROTOTYPE:
1075	CODE:	1862	CODE:
1076	RETVAL = coro_nready;	1863	RETVAL = coro_nready;
1077	OUTPUT:	1864	OUTPUT:
1078	RETVAL	1865	RETVAL
1079		1866
1080	void	1867	void
1081	schedule(...)	1868	throw (Coro::State self, SV *throw = &PL_sv_undef)
1082	PROTOTYPE:	1869	PROTOTYPE: $;$
		1870	CODE:
		1871	SvREFCNT_dec (self->throw);
		1872	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1873
		1874	# for async_pool speedup
		1875	void
		1876	_pool_1 (SV *cb)
1083	CODE:	1877	CODE:
1084	api_schedule ();	1878	{
		1879	struct coro *coro = SvSTATE (coro_current);
		1880	HV hv = (HV )SvRV (coro_current);
		1881	AV *defav = GvAV (PL_defgv);
		1882	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1883	AV *invoke_av;
		1884	int i, len;
		1885
		1886	if (!invoke)
		1887	croak ("\3async_pool terminate\2\n");
		1888
		1889	SvREFCNT_dec (coro->saved_deffh);
		1890	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1891
		1892	hv_store (hv, "desc", sizeof ("desc") - 1,
		1893	newSVpvn (strpair ("[async_pool]")), 0);
		1894
		1895	invoke_av = (AV *)SvRV (invoke);
		1896	len = av_len (invoke_av);
		1897
		1898	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1899
		1900	if (len > 0)
		1901	{
		1902	av_fill (defav, len - 1);
		1903	for (i = 0; i < len; ++i)
		1904	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1905	}
		1906
		1907	SvREFCNT_dec (invoke);
		1908	}
1085		1909
1086	void	1910	void
1087	cede(...)	1911	_pool_2 (SV *cb)
1088	PROTOTYPE:
1089	CODE:	1912	CODE:
1090	api_cede ();	1913	{
		1914	struct coro *coro = SvSTATE (coro_current);
1091		1915
		1916	sv_setsv (cb, &PL_sv_undef);
		1917
		1918	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1919	coro->saved_deffh = 0;
		1920
		1921	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1922	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1923	croak ("\3async_pool terminate\2\n");
		1924
		1925	av_clear (GvAV (PL_defgv));
		1926	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1927	newSVpvn (strpair ("[async_pool idle]")), 0);
		1928
		1929	coro->prio = 0;
		1930
		1931	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1932	api_trace (coro_current, 0);
		1933
		1934	av_push (av_async_pool, newSVsv (coro_current));
		1935	}
		1936
		1937
		1938	MODULE = Coro::State PACKAGE = Coro::AIO
		1939
		1940	SV *
		1941	_get_state ()
		1942	CODE:
		1943	{
		1944	struct io_state *data;
		1945
		1946	RETVAL = newSV (sizeof (struct io_state));
		1947	data = (struct io_state *)SvPVX (RETVAL);
		1948	SvCUR_set (RETVAL, sizeof (struct io_state));
		1949	SvPOK_only (RETVAL);
		1950
		1951	data->errorno = errno;
		1952	data->laststype = PL_laststype;
		1953	data->laststatval = PL_laststatval;
		1954	data->statcache = PL_statcache;
		1955	}
		1956	OUTPUT:
		1957	RETVAL
		1958
		1959	void
		1960	_set_state (char *data_)
		1961	PROTOTYPE: $
		1962	CODE:
		1963	{
		1964	struct io_state data = (void )data_;
		1965
		1966	errno = data->errorno;
		1967	PL_laststype = data->laststype;
		1968	PL_laststatval = data->laststatval;
		1969	PL_statcache = data->statcache;
		1970	}
		1971

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Comparing Coro/Coro/State.xs (file contents): Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs. Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC